2012年5月17日星期四

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High-intensity interval training (HIIT) is a short training session that may vary from 15-30 minutes. HIIT is mostly used for burning fat. burberry t shirts men , Most HIIT sessions have a 2:1 ratio in terms of time. Which means for example 1 minute of running and 30 seconds of jogging. A HIIT session involves a warmup period, several short, maximum-intensity efforts separated by moderate recovery intervals, and a cooldown period. But is HIIT really more effective than steady state cardio?

During the work interval, you actually push yourself outside of your target heart zone, which is the point when you start to lose your breath. Then you reduce the intensity so can you reclaim the oxygen debt just in time to do another work interval.

Studies by Tabata, Tremblay and others have shown this method to be more effective at burning fat and maintaining, or building, muscle mass than high-volume, lower intensity aerobic work-outs. According to a study by King , HIIT increases the resting metabolic rate (RMR) for the following 24 hours due to excess post-exercise oxygen consumption(EPOC), and may improve maximal oxygen consumption (VO2 max) more effectively than doing only traditional, long aerobic workouts.

The EPOC after moderate exercise (75-80%) will amount to approximately . 25 kcal/min or 15 kcal/hour. An extra 75 calories is definitely not much but in the end of the day all the calories add up. But in a year that would mean a extra 2. 4 kg of fat loss.

But the most important factor, whilst losing fat, is how many calories you burn daily. Calories in versus calories out. If you keep a high intensity steady state workout for a long duration, you're likely to burn far more calories than a brief HIIT workout. burberry womens shirts , A HITT workout is only 15-30 minutes in length. burberry button down shirts , And your body starts to burn fat as fuel only from 25-30 minutes. So if you only do a brief 20 minute HITT workout then you use carbohydrates as fuel and that is not as effective. If you are just a beginner then HIIT workouts can be very hard to do. The best method would be a combination of steady state and HIIT. What matters is how many calories you burn, not how you do it.
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